Over the years, various UK state bodies have produced or commissioned reports into undercover policing,  normally were it related to Special Branch or public order policing or related units. This page provides a comprehensive list of those that have made their way into the public domain (albeit sometimes in redacted form) with links. For convenience, it also contains the Home Office’s 1984, 1994 and 2004 Special Branch guidelines. If we have missed any, please let us know.